The letter shows up on a Tuesday. A workers' comp carrier wants three years of payroll detail. Or the 401(k) auditor needs contribution records by pay period. Or a state agency is asking you to prove how you classified a handful of workers. Your stomach drops, because you know the request means hours of digging through files, and you are not sure everything will line up when you find it.
Here is the good news. If you run payroll on ADP Workforce Now, most of what an auditor wants already lives in the system. You do not have to rebuild your records from scratch. You have to know which report answers which question, and you have to pull it in a form the auditor can actually use. That is a skill, not a mystery, and it is one you can build well before any letter arrives.
This guide walks through what auditors typically ask for, which ADP Workforce Now reports answer each request, how to organize what you hand over, where the common gaps hide, and how to stay ready all year so the next audit is a short conversation instead of a fire drill.
Different audits have different names, but the underlying requests rhyme. A workers' comp audit wants to confirm the wages you reported match what you paid, sorted by job classification. A 401(k) audit wants to prove that deferrals were withheld correctly, deposited on time, and matched per the plan document. An internal or SOX-style review wants to see that pay changes were approved by someone other than the person who entered them. A state or federal agency review usually centers on worker classification, overtime, and tax withholding.
Strip away the labels and auditors want four things. They want to see gross wages and how they were built. They want to see deductions and contributions, with dates. They want to see who was paid, in what role, at what rate. And they want a clean trail showing that changes were authorized. Once you think in those four buckets, matching a request to a report gets much easier.
Most audit requests start with wages, so start there. In ADP Workforce Now, the Payroll Register is your workhorse. It shows earnings, taxes, and deductions per employee per pay period, and it is the document most auditors recognize on sight. For a full-year picture, the Payroll Summary rolls those numbers up so totals are easy to tie out.
When an auditor wants wages sorted a particular way, the Earnings Record and the standard Wage and Tax reports do the heavy lifting. For workers' comp specifically, you often need wages split by class code, and you can build a custom report that groups earnings by department or job so the numbers land in the buckets the carrier expects. The key is to pull the same date range the auditor named, not the range that happens to be convenient. Mismatched periods create questions you do not want to answer twice.
For a 401(k) or benefits audit, the Deductions reports and the retirement contribution detail are what you need. Pull deferrals and employer match by employee and by pay date, because auditors care about timing as much as amount. Late deposits are one of the most common findings in a retirement plan audit, and the fix is easier when you can show the deposit dates against the pay dates cleanly.
If your plan has automatic enrollment, eligibility waiting periods, or a match formula with a true-up, be ready to show those mechanics too. ADP Workforce Now stores the deduction setup and the per-period amounts, and a well-built custom report can line up wages, deferral percentage, and dollars withheld so the auditor can follow the math without calling you.
Classification questions come up in workers' comp, agency, and internal audits alike. The Employee Roster and personnel reports in ADP Workforce Now show status, hire and termination dates, department, job title, and pay rate. For overtime and exempt-versus-nonexempt questions, you want a report that pairs the classification flag with actual hours and earnings, so you can show that nonexempt workers received overtime and exempt workers met the tests you relied on.
Terminations matter here too. Auditors like to test a few separated employees to confirm final pay was correct and timely. Keep termination dates, final check detail, and any payout of accrued time where you can pull them quickly. Scattered records are where small findings turn into bigger ones.
Rate history is worth a special mention. When an auditor tests a sample, they often want to see not just the current rate but how it changed over time, and whether each change was effective when the paycheck says it was. ADP Workforce Now keeps the history behind those rates, so you can show that a mid-year raise took effect on the date the record says and flowed into pay correctly. Pulling that history for a handful of sampled employees usually settles the question in one pass, rather than turning into a back-and-forth over whether a rate was applied on time.
The request that trips people up is the one about authorization. An auditor asks, in effect, "How do I know this raise was approved by a manager and not just typed in by the person who got it?" ADP Workforce Now keeps audit trail and change history that show who changed what and when. That history is your friend. It turns "trust us" into "here is the record."
If your organization uses separation of duties, where the person who enters a change is not the person who approves it, make sure the trail reflects that. When it does, an internal or SOX review moves fast. When it does not, expect follow-up questions and a recommendation to tighten controls.
Pulling the right report is half the job. Presenting it well is the other half. A few habits make a real difference.
First, label everything. Name each file with the report type, the entity, and the date range, so nobody has to guess what they are looking at. Second, match the auditor's periods exactly. If they asked for the plan year, do not send a calendar year. Third, tie your totals. Before you send anything, confirm that the register totals match the summary and match what you reported to the agency or carrier. If those three numbers agree, most of your audit risk disappears. Fourth, keep a short index that lists each request and the file that answers it. Auditors move faster when they are not hunting, and a faster audit is a cheaper, calmer audit.
One more habit saves grief later. Send only what was asked for, and nothing extra. It is tempting to hand over a giant export and let the auditor sort it out, but a broad data dump can raise questions about periods or employees that were never in scope, and it can expose more personal data than the request required. Give a clean answer to each specific ask. A tight package signals that your records are in order, and it keeps the review pointed at what the auditor actually came to check.
A client came to us the week after a workers' comp audit notice landed. The carrier wanted three years of wages split by class code, plus proof of overtime handling. The client had the data but had never pulled it by classification, and the numbers in their head did not match the premium they had been paying.
We built a custom report in ADP Workforce Now that grouped earnings by class code for each year. Rounded for illustration, it showed about $4,000,000 in total annual wages, with roughly $2,600,000 in a clerical class and $1,400,000 in a field class. The carrier had been rating almost everyone at the higher field rate. Once the split was documented and tied to the payroll summary, the reclassification pointed to an estimated overpayment in the low five figures per year. We also pulled the overtime detail so the auditor could confirm nonexempt workers were paid correctly. What started as a scramble became a two-page package with an index, and the audit closed without a single follow-up request. These figures are illustrative, but the pattern is common: the data was there, it just needed to be shaped the way the auditor thinks.
"How far back do I need to keep payroll records?" Retention rules vary by record type and by the agency involved, and several federal and state rules can apply at once. As a general habit, many employers keep payroll detail for several years, but you should confirm the specific periods with your licensed advisor or ADP representative, since limits and rules change. The safer move is to keep records at least as long as the longest rule that could apply to you.
"The auditor is asking for something I have never pulled before. Am I stuck?" Almost never. ADP Workforce Now can build custom reports that group and filter data in ways the standard reports do not. If you can describe what the auditor wants, the data usually already exists and just needs to be arranged. That is exactly the kind of request we handle in an afternoon.
"What if my totals do not match what I reported?" Find out why before the auditor does. A mismatch is not automatically a problem, but an unexplained one is. Pull the register, the summary, and the filing, and walk the difference back to its source. Most gaps trace to a timing difference, a void, or an adjustment that was handled outside the normal run.
What audit-ready looks like the rest of the year
The best time to prepare for an audit is when you are not having one. Audit-ready is a set of small habits, not a heroic push.
Set a quarterly rhythm where you tie your payroll register to your summary and to your tax filings, and save that reconciliation. Keep your classification flags and pay rates clean as changes happen, rather than fixing them once a year. Confirm that retirement deferrals are deposited on the same schedule every period, and keep the deposit dates. Review your change history now and then to confirm the approval trail is working the way you think it is. And keep a standing folder of your go-to reports, already built and named, so the next request is a matter of updating the date range.
Do these things and an audit stops being an event. It becomes a request you answer from records you already trust.
We are former ADP service professionals, and we work with ADP exclusively. We have sat on the other side of these reports and know exactly which one answers which request, because we built and pulled them for years. When an audit letter shows up and your hair is on fire, you do not open a ticket and wait on hold. You get a dedicated consultant who knows ADP Workforce Now, knows what auditors need, and helps you hand over a clean package the first time. No tickets, no hold queues. We've got you.
Staring down an audit letter with no idea where to start? REQUEST A CONSULTATION (ignitehcm.com/solutions/compliance).
ADP and the ADP logo are registered trademarks of ADP, Inc. This article is general guidance only and does not constitute tax, legal, or compliance advice. Recordkeeping requirements and audit standards change and vary by jurisdiction; confirm your specific obligations with your licensed advisor or ADP representative.